DAQ parameters for NI 9232

[zch10]

Hello,

I'm trying to setup a vibration signals acquisition procédure. for this I have:

- NI cDAQ-9174 

- NI 9232

- Labview 8.6

I'm trying to setup a simple VI using an assistant daq for the data acquisition and the write to measurement File for storage.

I have no problem with the accelerométer settings, it works well. however, I have problems to find the suitable daq parameters: the sample to read and the rate (I want find parameters allowing me to have small data files). I think that the minimum rate I can use with NI 9232 Is about 1kS/s, with this rate the files are too big. Even if I put a wait tool a in the while loop the storage rate is the same and the LVM files are so big.

[GovBob]

I don't have 8.6 but if you go to the example finder and type in 'decimate' there might be an example that you can model by.

[aterrazas]

Hello

do you have an specific frequency that you want to capture? If so, try to set the sample rate for a good resolution around 5 or 10 times the max frequency, and for the number of samples, for that specific frequency calculate the time period and capture at least 10 times that time.

regards

[Paolo_P]

Hello,

You also have this example from the community which show you how to manage data into more than one tdms file.

https://decibel.ni.com/content/docs/DOC-3916

Thanks